This is my favourite variation. I find myself making it as often as the original. You can get away with using any high quality bourbon. I usually have some Woodford Reserve lying around, so that’s what I typically use. This is my own recipe. I like the added kick of a ½ ounce of spirit and a few dashes of orange bitters.
2.5 oz bourbon
1 oz Cointreau (or other orange liqueur)
1 oz lemon juice
2 dashes orange bitters
Combine ingredients in shaker with ice, shake, and strain into coupe Serve over ice.